CN111650776A - Backlight module, circuit, television, control method, control device and storage medium - Google Patents
Backlight module, circuit, television, control method, control device and storage medium Download PDFInfo
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- CN111650776A CN111650776A CN202010526775.8A CN202010526775A CN111650776A CN 111650776 A CN111650776 A CN 111650776A CN 202010526775 A CN202010526775 A CN 202010526775A CN 111650776 A CN111650776 A CN 111650776A
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- G—PHYSICS
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133609—Direct backlight including means for improving the color mixing, e.g. white
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G—PHYSICS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- G09G3/3413—Details of control of colour illumination sources
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- H—ELECTRICITY
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- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
Abstract
The invention provides a backlight module, a backlight circuit, a television, a backlight module control method, a backlight module control device and a computer readable storage medium, wherein the backlight module comprises a plurality of LED units, wherein: the LED unit comprises three luminous chips with different colors, the luminous chips in each LED unit are arranged in an equilateral triangle, and any three different-color luminous chips which are not arranged in the same LED unit and are adjacent to each other are arranged in an equilateral triangle. The light emitting chips inside the LED units are arranged in an equilateral triangle, so that the light emitted by the LED units is uniform, and when the light emitted by the LED units passes through the reflective lens, the dispersed light is mixed with two different colors of the mutually adjacent LED units to obtain uniform backlight, so that the problem of backlight color cast is solved.
Description
Technical Field
The present invention relates to the field of backlight, and in particular, to a backlight module, a backlight circuit, a television, a backlight module control method, a backlight module control device, and a computer-readable storage medium.
Background
In the current RGB three-color chip or Mini-LED multi-chip backlight scheme, because of the general arrangement of the RGB chips, especially when the backlight composed of the reflective lens array arrangement is added, the defect of color cast on the backlight surface exists, which seriously affects the subjective visual effect and the uniformity of the surface chromaticity.
Disclosure of Invention
The invention mainly aims to provide a backlight module, a backlight circuit, a television, a backlight module control method, a backlight module control device and a computer readable storage medium, and aims to solve the problem of color cast of the backlight surface in the prior art.
To achieve the above object, the present invention provides a backlight module, which includes a plurality of LED units, wherein:
the LED unit comprises three luminous chips with different colors, the luminous chips in each LED unit are arranged in an equilateral triangle, and any three different-color luminous chips which are not arranged in the same LED unit and are adjacent to each other are arranged in an equilateral triangle.
Optionally, the three light emitting chips with different colors in the LED unit are a red light chip, a green light chip, and a blue light chip, respectively.
In order to achieve the above object, the present invention further provides a backlight module circuit, which includes an LED module and a power supply module, wherein:
the LED module comprises a plurality of LED units, the LED units comprise light-emitting chips with three different colors, and the power supply module comprises a plurality of power supply units;
the light emitting chips with the same color in the LED module are connected with the same power supply unit.
Optionally, each light emitting chip is connected in parallel with a zener diode, and an anode of the light emitting chip is connected to a cathode of the zener diode, and a cathode of the light emitting chip is connected to an anode of the zener diode.
Optionally, the LED module further includes voltage dividing resistors with the same number as the light emitting chips, and each voltage dividing resistor is connected in series with one light emitting chip.
In order to achieve the above object, the present invention further provides a television, which includes a display, wherein the display includes the backlight module and the backlight module circuit.
In order to achieve the above object, the present invention further provides a method for controlling a backlight module, where the backlight module includes an optical detection device, and the method includes:
acquiring current backlight data detected by the optical detection device;
comparing the current backlight data with preset backlight data;
and adjusting the driving voltage of the light-emitting chip according to the comparison result.
Optionally, the step of comparing the current backlight data with preset backlight data includes:
acquiring a current backlight CIE coordinate value and a preset backlight CIE coordinate value corresponding to the current backlight data;
and comparing the current backlight CIE coordinate value with a preset backlight CIE coordinate value.
In order to achieve the above object, the present invention further provides a backlight module control device, the television further includes a memory, a processor, and a computer program stored on the memory and operable on the processor, and the computer program, when executed by the processor, implements the steps of the backlight module control method as described above.
To achieve the above object, the present invention further provides a computer readable storage medium, having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the backlight module control method as described above.
The invention provides a backlight module, a backlight circuit, a television, a backlight module control method, a backlight module control device and a computer readable storage medium, wherein the backlight module comprises a plurality of LED units, wherein: the LED unit comprises three luminous chips with different colors, the luminous chips in each LED unit are arranged in an equilateral triangle, and any three different-color luminous chips which are not arranged in the same LED unit and are adjacent to each other are arranged in an equilateral triangle. The light emitting chips inside the LED units are arranged in an equilateral triangle, so that the light emitted by the LED units is uniform, and when the light emitted by the LED units passes through the reflective lens, the dispersed light is mixed with two different colors of the mutually adjacent LED units to obtain uniform backlight, so that the problem of backlight color cast is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a backlight module according to the present invention;
FIG. 2 is a schematic diagram of a backlight circuit according to the present invention
FIG. 3 is a flowchart illustrating a backlight module control method according to a first embodiment of the present invention;
fig. 4 is a schematic diagram of a module structure of the backlight module control device of the present invention.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the present embodiment are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention provides a backlight module, referring to fig. 1, comprising a plurality of LED units, wherein:
the LED units 100 include three different color light emitting chips, the light emitting chips in each LED unit 100 are arranged in an equilateral triangle, and any three different color light emitting chips that are not in the same LED unit 100 and are adjacent to each other are arranged in an equilateral triangle.
The three light emitting chips with different colors in the LED unit 100 are a red light chip 101, a green light chip 102, and a blue light chip 103.
The wavelength of light emitted by the red light chip 101 is 610-635 nm, the wavelength of light emitted by the green light chip 102 is 490-525 nm, and the wavelength of light emitted by the blue light chip 103 is 430-465 nm. The LED unit 100 includes a plurality of bonding pads (not shown) and packages each light emitting chip in a support by using a packaging adhesive (not shown), which is generally epoxy resin.
The light emitting chips inside the LED units 100 are arranged in an equilateral triangle, so that the light emitted by the LED units 100 is uniform, and when the light emitted by the LED units 100 passes through the reflective lens, the dispersed light is mixed with two different colors of the adjacent LED units 100 to obtain uniform backlight, thereby solving the problem of color cast of the backlight.
In order to achieve the above object, the present invention further provides a backlight module circuit, which includes an LED module and a power supply module, wherein:
the LED module comprises a plurality of LED units 100, the LED units 100 comprise three light-emitting chips with different colors, and the power supply module comprises a plurality of power supply units;
the light emitting chips with the same color in the LED module are connected with the same power supply unit.
Because the forward conduction voltage values of the red light chip 101, the green light chip 102 and the blue light chip 103 are different, generally, the red light chip 101 adopts a GaAs structure, the driving voltage is about 2.0-2.5 volts, and the green light chip 102 and the blue light chip 103 adopt GaN nodes, and the driving voltage is about 2.8-3.6 volts. In addition, even for light emitting chips of the same color, the forward on voltage varies depending on the material and process used for manufacturing the light emitting chips, and thus the driving voltage of the light emitting chips needs to be set as appropriate. Further, light bar is generally adopted in the LED module, and chips with the same color can be connected in series, which facilitates the control of the circuit module.
The light emitting chips with the same color in the LED module are connected with the same power supply unit, so that the light emitted by the light emitting chips with the same color is consistent, and the backlight is uniform.
Further, each light emitting chip is connected in parallel with a zener diode D, the anode of the light emitting chip is connected to the cathode of the zener diode D, and the cathode of the light emitting chip is connected to the anode of the zener diode D.
By arranging the Zener diode D, excessive voltage loss or breakdown of the light-emitting chip is avoided, the output voltage is limited within the breakdown voltage of the Zener diode D, and the light-emitting chip loss caused by static electricity is effectively reduced.
Further, the LED module further includes voltage dividing resistors R having the same number as the light emitting chips, and each voltage dividing resistor R is connected in series with one light emitting chip.
The divider resistance R set up in the outside of LED unit 100 because in the course of the work, divider resistance R can generate heat, and when the temperature of emitting light chip was too high, can reduce the luminous efficacy of emitting light chip, especially when being provided with phosphor powder in LED unit 100, the temperature promotes sooner, consequently, need set up divider resistance R in the outside of LED unit 100, avoids influencing the luminous efficacy of emitting light chip.
The arrangement of the divider resistor R can play a role in protecting the light-emitting chip.
In order to achieve the above object, the present invention further provides a television, which includes a display, wherein the display includes the backlight module and the backlight module circuit.
The television comprises liquid crystal display glass and a light source module, wherein the liquid crystal display glass comprises an upper glass substrate and a lower glass substrate, a color filter is arranged on the upper glass substrate, a Thin Film Transistor (TFT) device is arranged on the lower glass substrate, liquid crystal is arranged between the upper glass substrate and the lower glass substrate, and the light-emitting module mainly comprises a back plate, a backlight module, a reflector plate, a diffusion plate, an optical membrane, a middle frame and the like. The basic principle of liquid crystal television display is that liquid crystal is arranged between two conductive glass substrates, liquid crystal molecules are caused to be distorted and deformed under the action of two electrodes of the upper glass substrate and the lower glass substrate, the polarization state of light beams passing through a liquid crystal box is changed, and on-off control of backlight light beams is achieved. If an external electric field is not applied to the liquid crystal cell, since the twist pitch of the liquid crystal molecules in the cell in the liquid crystal display device is much larger than the wavelength of visible light, when the polarization direction of incident linearly polarized light coincides with the alignment direction of the liquid crystal molecules on the glass surface, the polarization direction thereof is twisted 90 as the liquid crystal molecules are twisted and deformed after passing through the entire liquid crystal layer. Is emitted from the other side and is in a light-transmitting state. If a voltage is applied to the liquid crystal box and reaches a certain value, the long axes of the liquid crystal molecules begin to incline along the direction of the electric field, except the liquid crystal molecules on the surfaces of the electrodes, the liquid crystal molecules between the two electrodes in the liquid crystal box are rearranged along the direction of the electric field, at the moment, the 90-degree optical rotation function disappears, the optical rotation function is lost between the orthogonal polaroids, and the device cannot transmit light. The liquid crystal display technology is to change the brightness according to the voltage, and the color displayed by each sub-picture element of the liquid crystal display depends on a color screening program. Because the liquid crystal has no color, the color filter is used for generating various colors, but not sub-primitives, the sub-primitives can only adjust the gray scale by controlling the passing intensity of light, only a few active matrix displays are controlled by analog signals, and most of the active matrix displays adopt a digital signal control technology.
The invention provides a backlight module control method, referring to fig. 3, fig. 3 is a flow diagram of a backlight module control method according to a first embodiment of the invention, the backlight module comprises an optical detection device, and the method comprises the following steps:
step S10, acquiring current backlight data detected by the optical detection device;
when the backlight starts to work, the optical detection device is started to detect the light emitted by the backlight module, and the detected light is subjected to data processing to obtain corresponding current backlight data, wherein the backlight data can comprise CIE coordinate values, RGB values, CMYK values or HSB values and the like corresponding to the light.
Step S20, comparing the current backlight data with the preset backlight data;
the preset backlight data is a color numerical value corresponding to preset white light, for example, in an RGB mode, the preset backlight data is (255, 255, 255); in the CMYK mode, the backlight data is preset to be (0, 0, 0, 0); in the HSB mode, the backlight data is preset to (0, 0, 100).
In step S30, the driving voltage of the light emitting chip is adjusted according to the comparison result.
When the current backlight data has a deviation with the preset backlight data, the brightness of the corresponding light emitting chip is changed by adjusting the driving voltage of the light emitting chip, so that the obtained backlight data is consistent with the preset backlight data.
Further, in the second embodiment of the backlight module control method according to the present invention proposed based on the first embodiment of the present invention, the step S20 includes the steps of:
step S21, acquiring a current backlight CIE coordinate value and a preset backlight CIE coordinate value corresponding to the current backlight data;
step S22, comparing the current backlight CIE coordinate value with a preset backlight CIE coordinate value.
The CIE1931RGB system was established by the CIE Commission on illumination, which stipulates that 700nm red, 546.1nm green and 435.8nm blue as the three primary colors, and later the CIE1931-xy chromaticity diagram was the most commonly used chart for describing the color range. The color gamut is the area of a triangle surrounded by coordinates of three pure colors of RGB. The larger the area of the triangle, the larger the gamut of the display television. A fixed color can be obtained in the CIE1931-xy chromaticity diagram through the coordinate values of x and y. The general display device for the white coordinate target CIE x, y values required in this embodiment is that x is 0.313, y is 0.329, and the lcd is regarded as x is 0.280, and y is 0.293.
The method comprises the steps of obtaining a CIE coordinate value corresponding to backlight in current backlight data detected by an optical detection device, and comparing the CIE coordinate value with a preset CIE coordinate value of the backlight, namely x is 0.280 and y is 0.293. For example, the CIE coordinate value corresponding to the backlight in the current backlight data is x equal to 0.275, and y is equal to 0.283, that is, the CIE coordinate value corresponding to the backlight deviates from the preset backlight CIE coordinate value at this time, and it can be known from a specific analysis that the backlight is bluish, so that the driving voltage of the blue light emitting chip needs to be reduced, and the luminance of the blue light emitting chip needs to be reduced, so that the backlight is closer to the backlight corresponding to the backlight whose CIE coordinate value is x equal to 0.280, and y is equal to 0.293.
In the embodiment, the dimming process is clear by comparing the current backlight CIE coordinate value with the preset backlight CIE coordinate value.
Referring to fig. 4, the backlight module control apparatus may include components such as a communication module 10, a memory 20, and a processor 30 in terms of a hardware structure. In the backlight module control device, the processor 30 is connected to the memory 20 and the communication module 10, respectively, the memory 20 stores thereon a computer program, which is executed by the processor 30 at the same time, and the steps of the above-mentioned method embodiments are realized when the computer program is executed.
The communication module 10 may be connected to an external communication device through a network. The communication module 10 may receive a request sent by an external communication device, and may also send a request, an instruction, and information to the external communication device, where the external communication device may be another backlight module control device, a server, or an internet of things device, such as a television.
The memory 20 may be used to store software programs as well as various data. The memory 20 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (for example, comparing the current backlight CIE coordinate value with a preset backlight CIE coordinate value), and the like; the storage data area may include a database, and the storage data area may store data or information created according to use of the system, or the like. Further, the memory 20 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 30, which is a control center of the backlight module control device, connects various parts of the entire backlight module control device by using various interfaces and lines, and executes various functions and processes data of the backlight module control device by running or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby integrally monitoring the backlight module control device. Processor 30 may include one or more processing units; alternatively, the processor 30 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 30.
Although not shown in fig. 4, the backlight module control device may further include a circuit control module, where the circuit control module is used for being connected to a power supply to ensure normal operation of other components. It will be understood by those skilled in the art that the backlight module control arrangement shown in fig. 4 does not constitute a limitation of the backlight module control arrangement and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be the Memory 20 in the backlight module control device in fig. 4, and may also be at least one of a ROM (Read-only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, where the computer-readable storage medium includes instructions for enabling a terminal device (which may be a television, an automobile, a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and those skilled in the art can understand the specific meanings of the above terms in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A backlight module, characterized in that, backlight module includes a plurality of LED units, wherein:
the LED unit comprises three luminous chips with different colors, the luminous chips in each LED unit are arranged in an equilateral triangle, and any three different-color luminous chips which are not arranged in the same LED unit and are adjacent to each other are arranged in an equilateral triangle.
2. The backlight module as claimed in claim 1, wherein the three different color light emitting chips in the LED unit are a red chip, a green chip and a blue chip, respectively.
3. A backlight module circuit, characterized in that, the circuit includes LED module and power module, wherein:
the LED module comprises a plurality of LED units, the LED units comprise light-emitting chips with three different colors, and the power supply module comprises a plurality of power supply units;
the light emitting chips with the same color in the LED module are connected with the same power supply unit.
4. The backlight module circuit of claim 3, wherein each of the light emitting chips is connected in parallel with a Zener diode, the anode of the light emitting chip is connected to the cathode of the Zener diode, and the cathode of the light emitting chip is connected to the anode of the Zener diode.
5. The backlight module circuit of claim 4, wherein the LED module further comprises a same number of voltage dividing resistors as the number of light emitting chips, each voltage dividing resistor being connected in series with one light emitting chip.
6. A television comprising a display comprising the backlight module of claim 1 or 2 and the backlight module circuit of any one of claims 3-5.
7. A method for controlling a backlight module, wherein the backlight module comprises an optical detection device, the method comprising:
acquiring current backlight data detected by the optical detection device;
comparing the current backlight data with preset backlight data;
and adjusting the driving voltage of the light-emitting chip according to the comparison result.
8. The backlight module control method of claim 7, wherein the step of comparing the current backlight data with the preset backlight data comprises:
acquiring a current backlight CIE coordinate value and a preset backlight CIE coordinate value corresponding to the current backlight data;
and comparing the current backlight CIE coordinate value with a preset backlight CIE coordinate value.
9. Backlight module control device, characterized in that the television further comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which computer program, when executed by the processor, carries out the steps of the backlight module control method as claimed in claim 7 or 8.
10. A computer-readable storage medium, having a computer program stored thereon, which, when being executed by a processor, carries out the steps of the backlight module control method according to any one of claims 8 to 9.
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| CN202010526775.8A CN111650776A (en) | 2020-06-09 | 2020-06-09 | Backlight module, circuit, television, control method, control device and storage medium |
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| CN202010526775.8A CN111650776A (en) | 2020-06-09 | 2020-06-09 | Backlight module, circuit, television, control method, control device and storage medium |
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Application publication date: 20200911 |